1#ifndef __COW_H__
2#define __COW_H__
3
4#include <asm/types.h>
5
6extern int init_cow_file(int fd, char *cow_file, char *backing_file,
7			 int sectorsize, int alignment, int *bitmap_offset_out,
8			 unsigned long *bitmap_len_out, int *data_offset_out);
9
10extern int file_reader(__u64 offset, char *buf, int len, void *arg);
11extern int read_cow_header(int (*reader)(__u64, char *, int, void *),
12			   void *arg, __u32 *version_out,
13			   char **backing_file_out, time_t *mtime_out,
14			   unsigned long long *size_out, int *sectorsize_out,
15			   __u32 *align_out, int *bitmap_offset_out);
16
17extern int write_cow_header(char *cow_file, int fd, char *backing_file,
18			    int sectorsize, int alignment,
19			    unsigned long long *size);
20
21extern void cow_sizes(int version, __u64 size, int sectorsize, int align,
22		      int bitmap_offset, unsigned long *bitmap_len_out,
23		      int *data_offset_out);
24
25#endif
26
27/*
28 * ---------------------------------------------------------------------------
29 * Local variables:
30 * c-file-style: "linux"
31 * End:
32 */
33